Democrats vowed Friday to move quickly on the impeachment investigation of President Donald Trump, saying the evidence of abuse of power from his Ukraine phone call and attempts to cover up wrongdoing were already clear.An intelligence whistleblower's complaint showing Trump pressuring Ukraine's president to supply dirt on election rival Joe Biden left the White House reeling and Trump doubling down with an implicit threat against witnesses to the call.

"The clarity of the president's actions is compelling and gave us no choice but to move forward," said House Speaker Nancy Pelosi.